JEE Main 2023 · ChemistryMultiple choiceSingle correctEasyCalculation

JEE Main 6 April 2023, Shift 2, Chemistry Q62

Question 62 of 90 in this shift, Chemistry question 2 of 30, Section A.

If the radius of the first orbit of hydrogen atom is

a_o

, then de Broglie's wavelength of electron in

3^{rd}

orbit is

(1) $3\pi a_o$
(2) $6\pi a_o$ Official answer
(3) $\frac{\pi a_o}{3}$
(4) $\frac{\pi a_o}{6}$

Official answer

Option 2

NTA final key.

Chapter: Structure of Atom
Topic: Bohr's Atomic Theory
Idea tested: Circumference and De Broglie Wavelength

Same idea in other shifts

Asked 3× in all

4 Apr 2024, Shift 1 · Q81The de-Broglie's wavelength of an electron in the $4^{\mathrm{th}}$ orbit is ________ $\pi a_0$ . ( $a_0$ = Bohr's radius)MediumNumerical value
24 Feb 2021, Shift 1 · Q53A proton and a $\mathrm{Li^{3+}}$ nucleus are accelerated by the same potential. If $\lambda_{\mathrm{Li}}$ and $\lambda_{\mathrm{p}}$ …MediumNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.